Process of producing caoutchouc substances.



rnrrz HOFMANN AND KONRAD nn'mmficx, or ELBEB/IELD, AND KURT mnrsnnnuae, or nsvnaxosnn, ma COLOGNE, GERMANY, ASSIGNORS r0 rannnuranmxnn vonm. rmnna. BAYER & 00., or ELIBEREELD, GERMANY, A CORPORATION or PatentedApr. 11, 1191s.

GERMANY. rnocms or rnomrcmc caou'rcxouc sonsrmcns; 3 specification of ram remit.

No Drawing.

To all whom it may concern Be it known that we, FRrrz HQFMANN, KoNRAn DnLBm'icK, and KURT MEISENBURG,

- doctors of philosophy, chemists, citizens of the German Empire, residing at, respec tively, Elberfeld, Elberfeld, and Leverkusen near Cologne, Germany, have 1n- -manufacture and product1on of. substances simllar to caoutchouc are described, which processes consist in heating hydrocarbons of the butadiene series such as butadiene its homologues and analogues with or without the addition of agents accelerating polymerization or by submitting these hydrocarbons to the action of alkaline or alkaline earth metals or of mixtures, alloys or amalgams thereof, or by submitting them in the cold or in the heat to the action of organic substances such as starch, albumen, urea,

glycerin or compounds .of a'similar behavior.

We have now found that the polymerization of thesaid hydrocarbons described in earlier applications can be promoted by carrying out these processes with the addition of natural caoutchouc or of the caoutchouc like substances described in earlier a plications.

In or er to illustrate the new process more fully the following examples are given, the parts being by weight Example 1: To 100 parts of the caoutchouc like product obtained from butadiene by the action of sodium, 100 parts of erythrene liquefied by cooling are added.

The resulting mixture is then allowed to Application filed November 25, 1011.. Serial No. 662,383.

butadiene are added. The hydrocarbon is completely soaked up by the caoutchouc. The mixture is then heated in a closed vessel tor 4 weeks to 70 C. After this time the hydrocarbon has disappeared and the caoutchouc like substance is .obtained.

Example 4: To 500 parts of the c'aoutchouc-like product obtained by polymerization of isoprene, 250 parts of isoprene mixture is kept in an incubator. After some time it is quantitatively polymerized to a caoutchouc like product. a

.Not only is the process of the present invention an advantageous process of polymerizing the hydrocarbons into a c'aoutchouclike product, but the resulting products contain the thus. formed caoutchouc in most intimate combination with the caoutchouc-like productused in effectingthe polymerization.

We claim 1. The process of producing a composite caoutchouc substance which. comprises I'nixing a hydrocarbon of the butadiene series ,and- 25 parts of starch are added, and the with about'a n equal amount of caoutchouc and polymer zing the hydrocarbon in such intermixture to substance. 7

2. The process of producing caoutchouc give a composite caoutchouc substances which comprises polymerizing beta-gamma-dimethylbutadiene by heating in the presence of a caoutchouc substance.

3. The process of producing caoutchouc substances which comprises polymerizing beta-gamma-dimethylbutadiene by heating in the presence of a synthetic caoutchouc substance.

4. The process of producing caoutchouc substances which comprises polymerizing beta-gamma-dimethylbutadiene by heating in the presence of a synthetic caoutchouc substance obtained b polymerizing betagamma-dimethylbuta iene.

5. The process of producin caoutchouc substances which comprises a ding to, an erythrene hydrocarbon a caoutchouc substance sufficient in amount to absorb a considerable amount of such hydrocarbon, and converting the thus absorbed hydrocarbon into a caoutchouc substance in intimate combination with the added caou't'chouc substance.

6. The process of producing caoutchouc v setour ha nds in the presence of two subsubstances which comprises absorbing betascrlbmg wltnesses.

gamma-dimethyl erythrene'in a polymerizav FRITZ HOFMANN- -1 tion product of such hydrocarbon, and Y KONRAD 'DELBRUCK. [11.5.] 5 polymerizing the thus absorbed hydrocar- KURT MEISENBURG. [14.8.]

ban to convert the same into a.- caoutchouc -Witnesses:

substance by heating. ALBERT Norma,

In testimony whereof we have hereuhto HELEN NUEER. 

